Take a look at the latest teasers for “Gotham” season 4, before the show returns this Thursday, September 21, at 8/7c, on FOX.

Now for the spoilers. TV Guide published a little peek at how Ra’s al Ghul will impact Bruce this season:

The Scoop: Ra’s al Ghul (Alexander Siddig) is back in the fold, returning to help put the finishing touches on Bruce’s transition into becoming Batman in Season 4. The famed leader of the League of Assassins will “snap” the last twig of Bruce’s innocence, as Siddig puts it, plunging the young man further down the dark path to becoming his vigilante alter ego. “My character has been on a centuries long mission to locate Bruce and finally finds him, and will do anything he can to get his hands on him, to manipulate him into what [Ra’s] wants him to be,” Siddig says. “That is going to be Bruce’s biggest challenge. Just how dark will he go? How far is he prepared to follow Ra’s al Guhl?” According to the actor, Season 4 is going to be “a season so far of extremes” – so get ready for things to get even darker on “Gotham”.

And about Bruce’s vigilante suit, TVLine confirmed what a previous teaser implied:

Is “Gotham’s” Lucius Fox the one making Bruce’s armor? — Mae Anne
You just evoked the name of executive producer Danny Cannon’s “favorite character”! “Yes, Lucius is beginning to suspect that Alfred and Bruce might have a double life and politely weaves his way in,” Cannon said when I hand-delivered your Q. “Lucius has worked for Wayne Industries and he may work there again one day, and for right now he doesn’t want to see Bruce get hurt. So he finds a way of helping without interfering.”